Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Que dia foi os Estados Unidos a equipe adversária?
 ###Tabelas: CREATE TABLE largest_cities_and_metropolitan_areas (largest_cities_and_metropolitan_areas_id AUTO_INCREMENT PRIMARY KEY, Rank INT, City VARCHAR, State VARCHAR, Population INT, Metro Population of 4 aspects INT) CREATE TABLE universities_and_colleges_ranked_by_endowment (universities_and_colleges_ranked_by_endowment_id AUTO_INCREMENT PRIMARY KEY, State Rank INT, National Rank INT, Institution VARCHAR, Location VARCHAR, Public or Private VARCHAR, Endowment Funds VARCHAR, Percentage Change YOY VARCHAR) CREATE TABLE zimbabwe_in_kenya (zimbabwe_in_kenya_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Home captain VARCHAR, Away captain VARCHAR, Venue VARCHAR, Result VARCHAR) CREATE TABLE current_members_of_the_baltimore_city_delegation (current_members_of_the_baltimore_city_delegation_id AUTO_INCREMENT PRIMARY KEY, District INT, Place of Birth VARCHAR, Delegate VARCHAR, Party VARCHAR, Took Office INT, Committee VARCHAR) CREATE TABLE matches (matches_id AUTO_INCREMENT PRIMARY KEY, Opposing Team VARCHAR, Against INT, Date VARCHAR, Venue VARCHAR, Status VARCHAR, Report VARCHAR)  
SELECT Date FROM matches WHERE Opposing Team = united states